Shot of Conrail West Arlington Railroad Bridge, as taken from a vehicle traveling north on Route 21, from the Soprano's opening theme. This shot appears at the 1:01 mark of the song.
TV Locations, Bridges - Rail, Buildings - Misc
The actual angle that the camera had on the bridge in the theme sequence was closer than what is shown here. The reason I didn't go for the actual angle here is that the sun glare on those Google shots was so bad, it would not have been enjoyable for the viewer.
The bridge spans the Passaic River, connecting Newark / Belleville with Arlington.